Article
Engineering, Electrical & Electronic
Zixuan Li, Zhihua Lai, Zhen Zhao, Lei Zhang, Wanli Jiao
Summary: Pure ZnO and Nd2O3-doped ZnO nanoparticles were synthesized using a hydrothermal method and characterized by XRD, SEM, and XPS. The doping of Nd promoted the growth of short columnar ZnO crystal and caused structural defects. The substitution of Nd3+ with Zn2+ resulted in a large amount of oxygen vacancies, enhancing the adsorption of oxygen molecule. The doped ZnO exhibited excellent sensitivity to H2S, with a response of 242-10 ppm H2S at 150 degrees C and a lowest detection limit of 50 ppb.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Engineering, Electrical & Electronic
Onur Alev, Imren Erguen, Okan Oezdemir, Leyla Colakerol Arslan, Serkan Bueyuekkoese, Zafer Ziya Ozturk
Summary: Cu-doped ZnO nanorods showed enhanced sensor response towards ethanol and allowed operation at lower temperatures compared to pristine ZnO nanorods, with 2% and 3% Cu-doped sensors exhibiting selective behavior towards ethanol.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Sanjaya Brahma, P. C. Huang, B. W. Mwakikunga, V. Saasa, A. A. Akande, Jow-Lay Huang, Chuan-Pu Liu
Summary: This study demonstrates the gas sensing properties of Cd-doped ZnO nanorods at room temperature and low temperature. The Cd doping in ZnO nanorods enhances the overall sensitivity to NH3 gas, with the highest sensitivity observed at a Cd doping concentration of 0.5 at %. The sensitivity continues to increase with the increase of temperature, indicating a significant enhancement of gas sensing performance at high temperature. Cd-doped ZnO nanorods also exhibit superior specificity for detecting NH3 over other gases such as NO2 and H2S at room temperature.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Analytical
Yan Gong, Xiaofeng Wu, Xiaofei Li, Anqi Wang, Min Zhang, Yunfa Chen
Summary: Core-shell Pt@Al-doped ZnO nanoparticles were synthesized and assembled into a sensor, showing excellent sensitivity and low detection limit towards acetone. The synergistic effect between Al doping and metal-ZnO hetero-interfaces significantly improves the acetone sensing properties of the sensor.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Engineering, Electrical & Electronic
V. L. Patil, D. S. Dalavi, S. B. Dhavale, N. L. Tarwal, S. A. Vanalakar, A. S. Kalekar, J. H. Kim, P. S. Patil
Summary: This report focuses on the deposition of nanocrystalline aluminium doped ZnO (Al doped ZnO: AZO) samples on seeded glass substrates using a cost-effective reflux method. The doping concentration of 'Al' ions ranged from 1 to 3 vol%. The study found that the deposited AZO samples exhibited a wurtzite hexagonal crystal structure and the formation of nanorods for undoped ZnO, with a reduction in diameter and the formation of fine tips for AZO samples. The photoluminescence study confirmed the presence of oxygen vacancies and defects in the AZO samples. Furthermore, the AZO samples demonstrated excellent gas sensing performance towards NO2 gas at a temperature of 175 degrees C, with a gas sensitivity of 85% for 5 ppm NO2 gas. This work shows promise for practical applications in the gas sensor technology field, particularly for low detection limits at low operating temperatures.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Environmental
Jian Fang, Jing-Jing Xue, Rong-Pu Xiao, Xi Chen, You-Min Guo, Ji-Ming Song
Summary: This study reported a gas sensor based on Pr-doped ZnO nanospindles for the detection of triethylamine (TEA). Among the different doping concentrations, the 2 mmol% Pr-ZnO sensor exhibited the highest response value towards TEA gas. The sensor showed good reproducibility, rapid response/recovery time, theoretical limit of detection, outstanding long-term stability, and excellent selectivity for TEA gas.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Analytical
Weiwei Guo, Linjie Jian, Xingmin Wang, Wen Zeng
Summary: In this study, pure and Ni-doped Bi2WO6 materials were successfully synthesized by a one-step hydrothermal method. The prepared samples were characterized using various techniques, and it was found that the 4 at% Ni-doped Bi2WO6 sensor exhibited the highest gas response to n-butanol at 325 degrees C, along with fast response-recovery characteristic, good stability, and unique selectivity. The enhanced gas sensing mechanism can be attributed to the unique hierarchical hydrangea-like structure, large specific surface area, low band gap energy, high electron separation efficiency, and abundant oxygen vacancies of the material.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Engineering, Electrical & Electronic
Yunjing Zhu, Yunlei Ma, Dandan Wu, Guojian Jiang
Summary: In this study, ZnO/Ti3C2Tx composites with different proportions of Ti3C2Tx were synthesized using the hydro-thermal method. The effects of MXene content on the gas sensing properties of the composites were investigated, and it was found that the few-layer MXene solution exhibited better dispersion and gas sensing properties for ZnO.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Physical
Xin Li, Nan Zhang, Caixia Liu, Samira Adimi, Jingran Zhou, Dali Liu, Shengping Ruan
Summary: The ZnO/Zn2SnO4 nanocomposites synthesized via one-step hydrothermal method demonstrated excellent gas sensing properties towards formaldehyde, showing higher sensitivity, better selectivity, and lower detection limit compared with pristine Zn2SnO4 and ZnO.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Energy & Fuels
Sivalingam Ramesh, Young-Jun Lee, Kyeongho Shin, Lama Sanjeeb, K. Karuppasamy, Dhanasekaran Vikraman, Adaikalam Kathalingam, Hyun-Seok Kim, Heung Soo Kim, Joo-Hyung Kim
Summary: In this study, Co3O4/RuO2@nitrogen-doped graphene oxide (NGO) composite materials were successfully synthesized for supercapacitor and gas sensor applications. The synthesized composites showed nanostructured grains anchored on the NGO surface, exhibiting good electrochemical performance and potential applications in supercapacitors and gas sensors.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Analytical
Weiwei Guo, Xinran Li, Xue Gao, Wen Zeng, Xingmin Wang
Summary: In this study, pure CoSn(OH)6 and Fe-doped CoSn(OH)6 nanocubes were synthesized by hydrothermal method for gas sensing applications. Extensive characterizations, such as XRD, SEM, and XPS, were performed to investigate the crystal structure, morphology, and chemical composition of the samples. Compared to pure CoSn(OH)6, the gas sensing performance of 5Fe-CoSn(OH)6 towards N-butyl alcohol exhibited significant improvement, showing high gas response of 60.309 at a relatively low operating temperature of 200 degrees C. Additionally, the 5Fe-CoSn(OH)6 based sensor showed excellent stability, selectivity, and humidity resistance to N-butyl alcohol. The enhanced gas sensing properties of 5Fe-CoSn(OH)6 can be attributed to its large specific surface area, narrow band gap, sufficient oxygen vacancies, and efficient separation of electron-hole pairs.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Multidisciplinary
S. P. Bharath, Kasturi V. Bangera
Summary: Aluminum-doped zinc oxide (AZO) thin films with varying doping concentrations were synthesized using spray pyrolysis technique, showing significant effects on grain size, electrical properties, and gas-sensing characteristics. Various characterization techniques were adopted to study the material formation and performance.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Engineering, Environmental
Jian Song, Tengfei Guo, Chongyu Huang, Meng Liu, Haoran Cui, Weiguo Huang, Yuelin Wang, Tie Li
Summary: A high-performance gas sensor based on calixarenes applied on organic thin film transistor (OTFT) for detecting nerve agent simulant DMMP was designed in this study. The sensor showed high sensitivity, good selectivity, and stability, making it potentially applicable in complex environments.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Ceramics
Chi-Chung Kei, Chih-Chieh Wang, Tsong-Pyng Perng
Summary: The study introduces a novel method to prepare an Al-doped ZnO nanotube oxygen sensor with tunable wall thickness, using tris(8-hydroxyquinoline) gallium nanowire as a template. The research shows that the gas response of the nanotubes is inversely proportional to wall thickness and is influenced by the Al2O3 content.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Engineering, Environmental
Jian Song, Tengfei Guo, Chongyu Huang, Meng Liu, Haoran Cui, Weiguo Huang, Yuelin Wang, Tie Li
Summary: In this study, a high-performance gas sensor for detection of nerve agent simulant DMMP was developed using calixarenes. The sensor showed improved sensitivity, selectivity, and stability compared to traditional sensors. The results suggest that this approach could offer solutions for high-performance gas detection.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Analytical
Mengmeng Guo, Na Luo, Yueling Bai, Zhenggang Xue, Qingmin Hu, Jiaqiang Xu
Summary: A porous heterostructure WO3-C/In2O3 was designed and prepared for a miniature H2 sensor, which showed higher response value, lower operating temperature, fast response-recovery speed, and low limit of detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Feng Hu, Hui Hu, Yuting Li, Xiaohui Wang, Xiaowen Shi
Summary: Arsenic contamination in water bodies is a significant health risk. This study developed a chitosan-catechol modified electrode for rapid and accurate detection of trace amounts of arsenic. The modified electrode demonstrated good detection capability and resistance to ionic interference, making it suitable for in situ detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Yantao Zhang, Qian Liu, Tao Tian, Chunhua Xu, Pengli Yang, Lianju Ma, Yi Hou, Hui Zhou, Yongjun Gan
Summary: In this study, a lysosome-targeting buffering fluorogenic probe (Lyso-BFP) was designed and synthesized, demonstrating excellent photostability, pH specificity, and responsiveness to lysosomal acidification in living cells. The performance of Lyso-BFP in pH sensing was attributed to the inhibition of the photo-induced electron transfer process. Lyso-BFP allowed for wash-free imaging and long-term real-time monitoring of lysosome pH changes based on its off-on fluorescence behavior and buffer strategy.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Wei Cai, Wenbo Sun, Jiayue Wang, Xiaokui Huo, Xudong Cao, Xiangge Tian, Xiaochi Ma, Lei Feng
Summary: In this study, a near-infrared fluorescent probe HCBG was developed for imaging of alpha-GLC. HCBG exhibited excellent selectivity and sensitivity towards alpha-GLC in complex bio-samples, and showed good cell permeability for in situ real-time imaging. Through the high-throughput screening system established by HCBG, a natural alpha-GLC inhibitor was successfully isolated and identified. This study provides a novel fluorescence visualization tool for discovering and exploring the biological functions of diabetes-related gut microbiota, and a high-throughput screening approach for alpha-GLC inhibitor.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Trey W. Pittman, Xi Zhang, Chamindie Punyadeera, Charles S. Henry
Summary: Heart failure is a growing epidemic and a significant clinical and public health problem. Researchers have developed a portable and affordable diagnostic device for heart failure that can be used at the point-of-care, providing a valid alternative to current diagnostics approaches.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Anders O. Tjell, Barbara Jud, Roland Schaller-Ammann, Torsten Mayr
Summary: An optical hydrogen peroxide sensor based on catalytic degradation and the detection of produced oxygen is presented. The sensor offers higher resolution and better sensitivity at lower H2O2 concentrations. By removing O2 from the sample solution, a more sensitive O2 sensor can be used for measurement. The sensor has been successfully applied in a flow-through cell to measure H2O2 concentration in different flow rates.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Seong Jae Kim, Ji-hun Jeong, Gaabhin Ryu, Yoon Sick Eom, Sanha Kim
Summary: Surface-enhanced Raman spectroscopy (SERS) is a high-sensitivity, label-free detection method with various analytical applications. Researchers have developed a hydrophobic SERS substrate based on engineered carbon nanotube arrays (CNT-SERS) and studied the role of structural design at both micro and nanoscales. The substrate demonstrated controlled self-enrichment capability and enhanced sensitivity, with a significant increase in the SERS signal. The study also proposed a theoretical model and a concentration strategy inspired by plants for analyte deposition on microarrays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Dan Zhao, Renjun Jiang, Xiaoqiang Liu, Subbiah Alwarappan
Summary: In this study, a novel ternary composite material was constructed by assembling cerium vanadate nanorods on reduced graphene oxide-microcrystalline cellulose nanosheets, and it was used for real-time monitoring of the concentration of superoxide anions in vivo. The ternary composite showed excellent conductivity, large surface area, and abundant active sites, leading to a wider linear range, high sensitivity, low detection limit, and fast response time for superoxide anion detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Tengfei Wang, Liwen Wang, Guang Wu, Dating Tian
Summary: In this study, a covalent organic framework material TaTp-COF with porous and uniform spheres was successfully prepared via hydrothermal reaction, and it was found to significantly enhance the aggregation-induced emission (AIE) of berberine. The unique emission properties of berberine on TaTp-COF were studied and utilized for the sensitive detection of berberine.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Lin Li, Yilei Ding, Lei Xu, Shuoran Chen, Guoliang Dai, Pengju Han, Lixin Lu, Changqing Ye, Yanlin Song
Summary: In this study, a novel TTI based on a ratiometric fluorescent nanosensor is designed, which has the advantages of high accuracy and low cost. Experimental and theoretical investigations confirm its pH responsiveness and demonstrate its good sensitivity and reliability. By monitoring the total volatile basic nitrogen, this TTI can accurately predict food spoilage and can be adaptively modified for different types of food. The TTI based on this nanosensor enables visual monitoring of food quality.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Fangju Chen, Xueting Wang, Wei Chen, Chenwen Shao, Yong Qian
Summary: Lung cancer is the second most common malignant tumor worldwide. Drug resistance in lung cancer leads to treatment failure and recurrence in majority of patients. This study developed a fluorescent prodrug that can be activated in cancer cells to release drugs, and its signal can be tracked by imaging. It shows a unique autophagy-driven ferroptosis effect, indicating its potential for targeting drug-resistant cancer cells.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Weichao Li, Qiming Yuan, Zhangcheng Xia, Xiaoxue Ma, Lifang He, Ling Jin, Xiangfeng Chu, Kui Zhang
Summary: This study developed a high-performance gas sensor for formaldehyde detection by modifying ZnSnO3 with ZnO QDs and SnO2 QDs. The modified sensor showed improved sensing response and lower working temperature. The presence of ZnO QDs formed rich heterojunctions, increased surface area, and provided oxygen deficiency for formaldehyde sensing reaction, thus enhancing the sensor performance. This research provides an alternative method to enhance the sensing properties of MOS by QDs modification.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Joung-Il Moon, Eun Jung Choi, Younju Joung, Jin-Woo Oh, Sang-Woo Joo, Jaebum Choo
Summary: A novel nanoplasmonic substrate was developed for biomedical applications, which showed strong hot spots for detecting biomarkers at low concentrations. The substrate, called AuNPs@M13, was made by immobilizing 60 nm gold nanoparticles onto the surface of an M13 bacteriophage scaffold. It demonstrated higher sensitivity and lower limit of detection compared to commercially available assays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Ning Li, Ya Zhang, Ying Xu, Xiaofang Liu, Jian Chen, Mei Yang, Changjun Hou, Danqun Huo
Summary: The molecular subtype of breast cancer guides treatment and drug selection. Invasive tests can promote cancer cell metastasis, so the development of high-performance, low-cost diagnostic tools for cancer prognosis is crucial. Liquid biopsy techniques enable noninvasive, real-time, dynamic, multicomponent, quantitative, and long-term observations at the cellular, genetic, and molecular levels. A Cu-Zr metal-organic framework (MOF) nanoenzyme with monatomic Cu attachment has been synthesized and proven to have high catalytic performance. The sensor constructed using this nanoenzyme shows potential for accurate classification of breast cancer serum samples.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Jeongmin Kim, Hyemin Kim, Seunghyun Park, Hyeonaug Hong, Yong Jae Kim, Jiyong Lee, Jaeho Kim, Seung-Woo Cho, Wonhyoung Ryu
Summary: This study presents a method to fabricate independently functioning microneedle (MN) electrodes with narrow intervals for high precision electrochemical sensing. The optimized mixture of photocurable polymer and single-wall carbon nanotubes was used to mold single composite MNs, which were then attached to pre-patterned electrodes. Plasma etching and electropolymerization were performed to enhance the electrochemical activity, and Prussian blue and glucose oxidase were electrodeposited on the MNs for glucose detection. The MN electrodes showed good sensitivity and linearity, and the feasibility of glucose detection was demonstrated in an in vivo mouse study.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)